Transgenic avians with an ovomucoid gene expression control region linked to a nucleotide sequence encoding a heterologous polypeptide
View Patent ↗The present invention provides novel isolated nucleic acids that comprise an avian nucleic acid sequence comprising a ovomucoid gene expression control region. The ovomucoid promoter region of the present invention will allow expression of an operably linked heterologous nucleic acid insert in a transfected avian cell such as, for example, an oviduct cell. The isolated avian ovomucoid of the present invention may be operably linked with a selected nucleic acid insert, wherein the nucleic acid insert encodes a polypeptide desired to be expressed in a transfected cell. The recombinant DNA of the present invention may further comprise a polyadenylation signal sequence. The present invention further includes expression vectors comprising an isolated avian ovomucoid gene expression control region of the present invention, and transfected cells and transgenic avians comprising the expression vectors.
1. A transgenic avian comprising a nucleic acid comprising an avian ovomucoid gene expression control region operably linked to a nucleotide sequence encoding a heterologous polypeptide, wherein the ovomucoid gene expression control region comprises a sequence at least 95% sequence identical to SEQ ID NO:26.
2. The transgenic avian of claim 1 , wherein the avian is selected from the group consisting of a chicken, a turkey, a duck, a goose, a quail, a pheasant, a ratite, an ornamental bird and a feral bird.
3. The transgenic avian of claim 1 , wherein the avian is a chicken.
4. The transgenic avian of claim 1 , wherein the ovomucoid gene expression control region comprises the nucleic acid sequence of SEQ ID NO:26.
5. The transgenic avian of claim 1 , wherein the nucleic acid comprises a polyadenylation signal sequence.
6. The transgenic avian of claim 5 , wherein the polyadenylation signal sequence is derived from the SV40 virus.
7. The transgenic avian of claim 1 , wherein the nucleotide sequence comprises a codon optimized for protein expression in an avian.
8. The transgenic avian of claim 1 , wherein the heterologous polypeptide is a human pharmaceutical protein.
9. The trafisgenic avian of claim 1 , wherein the transgenic avian produces the heterologous polypeptide in the serum or an egg white.
10. The transgenic avian of claim 9 , wherein the transgenic avian produces the heterologous polypeptide in an egg white.
11. The transgenic avian of claim 10 , wherein the nucleotide sequence encodes an immunoglobulin or subunit thereof.
12. The transgenic avian of claim 1 , wherein the heterologous polypeptide is a member selected from the group consisting of human growth hormone, interferon, lysozyme, β-casein, albumin, α-1 antitrypsin, antithrombin III, collagen, factor VIII, factor IX, factor X, fibrinogen, insulin, lactoferrin, protein C, erythropoietin (EPO), granulocyte colony-stimulating factor (G-CSF), granulocyte macrophage colony-stimulating factor (GM-CSF), tissue-type plasminogen activator (tPA), feed additive enzymes, somatotropin, chymotrypsin, immunotoxins, and immunoglobulins.